Patents and Certification Patent Certificate Authentication Certificate System and Method for Fault Prediction of a PEMFC (Proton Exchange Membrane Fuel Cell) 2025.12.15 Modular Power Supply Device Based on Hydrogen Fuel Cells with Parallel Connection Capability 2025.07.17 Hydrogen Fuel Cell Power Pack (Class 13) 2025.06.11 Drone (Class 12) 2025.01.03 Method and device for map display based on path direction 2015.07.16 Air supply device for fuel cells and fuel cell system including the same 2013.08.20 Wireless power receiver and its control method 2018.07.25 Wireless power transmitter and its control method 2018.07.25 High-temperature fuel cell system with improved heat utilization 2014.08.06 Fuel cell system with a combustion structure for expanding flammability limits 2014.10.28 Unmanned pesticide supply system 2017.11.01 Modular drone 2018.08.09 Control system for unmanned aircraft 2019.06.03 High-speed encryption method of video data for LTE-based swarm unmanned aviation system 2020.03.04 Emergency alert system using multiple drones 2020.01.03 Modular drone connection structure 2020.05.21 Ground control device for unmanned aircraft 2020.11.05 Unmanned aircraft black box system (PCT) 2021.01.21 Fuel cell power pack integrated with a hydrogen tank and drone equipped with it 2023.06.29 Drone equipped with an energy harvesting device 2023.01.26 Hydrogen power pack for drones with a temperature control system 2023.07.20 Drone station for automatic landing and hydrogen refueling of hydrogen drones 2023.07.20 Electric vehicle charging system using hydrogen fuel cells 2023.03.14 Vehicle charging system capable of hydrogen and electric charging 2023.03.14 Drone (Class 12) 2019.04.10 HogreenAir (Class 12) 2018.10.16 Keefly 2019.09.10
